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China Low Smoke Zero Halogen Sheath Cable Material Suppliers & Factory for Fire Resistant Solutions
Product Features
Weather resistance
Low smoke zero halogen sheath cable material can withstand the effects of daily meteorological conditions, such as sunlight, rain and humidity, so it is suitable for indoor and outdoor applications.
High fire resistance
Low smoke zero halogen sheath material usually have high fire resistance, which can protect the insulation material inside the cable in a fire and prevent the spread of fire.
Low smoke combustion
Low smoke zero halogen sheath cable material produces less smoke in the event of a fire, which helps to improve the safety of personnel evacuation.
Low toxicity
Low smoke zero halogen sheath cable material usually has low toxicity, even when burning, it produces less toxic gas, helping to reduce the risk of toxicity in fire.
Environmental protection
The zero halogen composition makes this sheath material more environmentally friendly and reduces the damage to the atmospheric ozone layer.
Scope of Use
Cable and optical cable, coaxial cable, network cable, elevator cable, etc.
Test Items and Standards
Properties of halogen-free low smoke flame retardant thermoplastic polyolefin insulating materials and sheathing materials.
| No. | Inspection Item | Unit | Requirements | ||
|---|---|---|---|---|---|
| WDZ-Y-J70 | WDZ-Y-H70 | WDZ-Y-H90 | |||
| 1 | Tensile strength | MPa | ≥10.0 | ≥10.0 | ≥10.0 |
| 2 | Elongation at break | % | ≥160 | ≥160 | ≥160 |
| 3 | Air aging chamber | ||||
| Aging temperature | ℃ | 100±2 | 100±2 | 110±2 | |
| Aging time | h | 168 | 168 | 240 | |
| Maximum rate of change of tensile strength | % | ±25 | ±25 | ±25 | |
| Maximum rate of change of elongation at break | % | ±25 | ±25 | ±25 | |
| 4 | Thermal deformation | ||||
| Test temperature | ℃ | 90±2 | 90±2 | 90±2 | |
| Experimental result | % | ≤50 | ≤50 | ≤50 | |
| 5 | 20℃ volume resistivity | Ω·m | ≥1.0×1012 | ≥1.0×1010 | ≥1.0×1010 |
| 6 | Volume resistivity at operating temperature | ||||
| Test temperature | ℃ | 70±1 | — | — | |
| Volume resistivity | Ω·m | ≥2.0×108 | — | — | |
| 7 | Dielectric strength | MV/m | ≥20 | ≥18 | ≥18 |
| 8 | Heat shock test | ||||
| Test temperature | ℃ | 130±3 | 130±3 | 130±3 | |
| Test time | h | 1 | 1 | 1 | |
| Experimental result | — | No cracking | No cracking | No cracking | |
| 9 | Impact embrittlement temperature | ||||
| Test temperature | ℃ | -25 | -25 | -25 | |
| Experimental result | Number | ≤15/30 | ≤15/30 | ≤15/30 | |
| 10 | Ozone resistance test | ||||
| Test temperature | ℃ | — | 25±2 | 25±2 | |
| Experiment time | h | — | 24 | 24 | |
| Ozone concentration | ppm | — | 250~300 | 250~300 | |
| Experimental result | — | — | No cracking | No cracking | |
| 11 | Hot water immersion test | ||||
| Test temperature | ℃ | — | 70±2 | 70±2 | |
| Experiment time | h | — | 168 | 168 | |
| Maximum rate of change of tensile strength | % | — | ±30 | ±30 | |
| Maximum rate of change of elongation at break | % | — | ±35 | ±35 | |
| 12 | Oxygen index | % | ≥28 | ≥30 | ≥30 |
| 13 | Smoke density | ||||
| flameless | — | ≤350 | ≤350 | ≤350 | |
| flaming | — | ≤100 | ≤100 | ≤100 | |
| 14 | Combustion releases gas acidity | ||||
| HCI and HBr content | % | ≤0.5 | ≤0.5 | ≤0.5 | |
| HF content | % | ≤0.1 | ≤0.1 | ≤0.1 | |
| pH value | — | ≥4.3 | ≥4.3 | ≥4.3 | |
| Electric conductivity | μS/mm | ≤10 | ≤10 | ≤10 | |
| 15 | Material smoke toxicity hazards | According to the application requirements of the product, negotiated by the supply and demand parties. | |||
Certifications
Frequently Asked Questions
What environments are Low Smoke Zero Halogen (LSZH) sheath cables suitable for?
Due to their high weather resistance, LSZH sheath cable materials can withstand the effects of daily meteorological conditions such as sunlight, rain, and humidity, making them highly suitable for both indoor and outdoor applications.
How does LSZH cable material perform during a fire?
LSZH materials feature high fire resistance, which helps protect the inner insulation and prevents the fire from spreading. Furthermore, they produce significantly less smoke and low toxic gas emissions, greatly improving the safety of personnel evacuation.
Is the LSZH sheath material environmentally friendly?
Yes. The zero halogen composition makes this sheath material much more environmentally friendly, as it reduces the potential damage to the atmospheric ozone layer compared to traditional materials.
What types of cables commonly use this sheath material?
The LSZH material is widely used in a variety of cables, including optical cables, coaxial cables, network cables, and elevator cables.
What is the tensile strength requirement for WDZ-Y-J70 material?
According to the standard properties table, the tensile strength requirement for WDZ-Y-J70 material is ≥ 10.0 MPa, and it must maintain an elongation at break of ≥ 160%.
What is the oxygen index requirement for these halogen-free materials?
The oxygen index requirement is ≥ 28% for WDZ-Y-J70, and ≥ 30% for both WDZ-Y-H70 and WDZ-Y-H90 materials.